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A 37-year-old member asked:

Can two parents with positive blood types have a negative blood type baby?

2 doctor answers3 doctors weighed in
Dr. Juan Merayo-Rodriguez
Pathology 23 years experience
Yes it could: Someone who is "rh positive" or "rh+" has at least one rh+ allele, but could have two. Their genotype could be either rh+/rh+ or rh+/rh-. Someone who rh- has a genotype of rh-/rh-. A father who is rh+ could pass either an rh+ or rh- allele to his son or daughter. And the same from rh+ mother if genotype is rh+/rh-. The children have 25% chance of having rh-.
Dr. Richard Pollard
Anesthesiology 30 years experience
Maybe: Rhesus transmission (+ or -) is not a clear as the ABO transmission. This is purely a result of the genetic expression of each parent, and this may be different when their genes are combined in a new child.

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Ghana
A 22-year-old female asked:

What wil be a baby blood group when both parents are a positive blood group?

1 doctor answer2 doctors weighed in
Dr. Sewa Legha
Medical Oncology 50 years experience
A Positive: The baby inherits one from each parent, so it should be a positive.
Dr. Adam Beall
Dr. Adam Beall commented
General Surgery 14 years experience
sorry dude, hate to be bearer of bad news, but if the baby is not A Positive, it's not yours.
Mar 3, 2014

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